detecting unfolded repeat number

[John Galbraith]

I have a score that does not have any true repeats.  However, there are 
parts that repeat some sections.  So, in the conductor's score, I am using
unfolded repeats wherever I can in the parts.  This eases maintainance of the
score, and I can change them to voltas when I go to create the individual 
parts.   One problem is that marks (like rehearsal marks and other 
nonmusical indicators) that I only want to see once appear at the beginning
of every unfolded repeat.  Another problem is that my rehearsal marks
need to be different on each repeat.

Is there a way to detect which unfolded repeat you are on (from the
guile interpreter?) and output (or skip) different marks depending on the
result? 

John